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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 506 | } |
| 507 | } |
| 508 | } |
| 509 | } |
| 510 | |
| 511 | if (! isset($src) ) |
| 512 | return false; |
| 513 | |
| 514 | // Do we need to constrain the image? |
| 515 | if ( ($max_dims = apply_filters('attachment_max_dims', $max_dims)) && file_exists($src_file) ) { |
| 516 | |
| 517 | $imagesize = getimagesize($src_file); |
| 518 | |
| 519 | if (($imagesize[0] > $max_dims[0]) || $imagesize[1] > $max_dims[1] ) { |
| 520 | $actual_aspect = $imagesize[0] / $imagesize[1]; |
| 521 | $desired_aspect = $max_dims[0] / $max_dims[1]; |
| 522 | |
| 523 | if ( $actual_aspect >= $desired_aspect ) { |
| 524 | $height = $actual_aspect * $max_dims[0]; |